A minimal model to understand the discrepancies between acoustic and electromagnetic emissions in fracturing processes

Despite their common origin, experiments show that acoustic and electromagnetic emissions evolve in different ways during the fracture processes of brittle materials. It is common to find peaks of acoustic activity without the presence of electromagnetic emissions and vice versa, it is possible to find high electromagnetic radiation without significant acoustic activity. As far as we know, there are currently no models that explain these discrepancies in a simple way. In this work we propose a minimal model that is able to generate the frequently observed discrepancies between acoustic and electromagnetic emissions during fracture processes of brittle materials. The model is an electrical version of the fiber bundle model where the fibers are replaced by fuses in a resistor. The resistors are placed on a Wheatstone bridge subjected to a gradually increasing voltage. A capacitor is added to generate charge and discharge processes that will generate the electromagnetic emissions, while the breaking of the fuses will generate the acoustic emissions. The model allows to follow the evolution of acoustic and electromagnetic activities and shows that, despite their common origin, the two phenomena evolve differently.

• Autores: Clavijo Ramírez, Jorge Enrique; Salas, Yecid; Sánchez, Sandra Esperanza
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2021
• Institución: Escuela Colombiana de Ingeniería Julio Garavito
• Repositorio: Repositorio Institucional ECI
• Idioma: eng
• OAI Identifier: oai:repositorio.escuelaing.edu.co:001/2398
• Acceso en línea: https://repositorio.escuelaing.edu.co/handle/001/2398; https://iopscience.iop.org/article/10.1088/1742-6596/2046/1/012027
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-nd/4.0/